Hi John,
One way to do non-ruled geometry, especially in your case where the geometry isn’t too complex, is to use a form feature in s/m mode. You basically create a punch or die (push vs. pull the material) as a separate part file in Pro/E. With a form feature you can create the exact shape you want, and then do a flatten feature to get the ‘flat state.’ One thing to keep in mind is that in sheet metal, Pro/e does not account for material stretching with any bending, forming or punching features. The two sides are always the same distance apart, so as you add those features to the part, the mass of the part will increase. That may not affect everyone, but it is something to be aware of.
Thinking about it, this technique is pretty easy for modeling, but maybe not the best for setting up your production or manufacturing of the part, especially if it is going to be a rather large piece that is done in segments and welded together. You may be able to accomplish the same thing by creating the finished part and dividing it up into segments depending on how it gets manufactured.
Pro/E does however have the capability to unbend non-ruled geometry, but it involves telling Pro/E where to allow the material to stretch, and in what manner. When you allow the stretching, it actually adds material to the model, and maybe not exactly the way you want it to, so again it increases in mass, but it does get you to the flat state. Personally, I’m not a big fan of this technique, but it is available.
Best Regards,
Matt
